Hi all, hope you can help...

I've got a 1981 240d with automatic transmission.
Valves hadn't been adjusted in too long, so I set about it (first time I've done this)...
Seemed to go fine: all the valves were too tight though, so adjusted to the recommended 0.1mm and 0.3mm.

Started the car back up, engine ran okay but: MUCH louder than before, gear shifts happen at much higher speed/revs than before, and the engine runs on a little after turning off the ignition.

Figured not all was well, left it overnight, checked again. All valves except 2 had slightly too much clearance, so readjusted until on the intake the 0.1 feeler will fit but not the 0.15, on exhaust the 0.3 will fit but not the 0.4 - I read somewhere that it's better to err on the loose side.

Ran the car again: a little quieter, but still noisier than before; engine still shifting far too late (eg. 58mph before it shifts into 4th - rev/speed limit for 3rd is 64mph), and still running on after the ignition is turned off - now for longer than before.

Any help much appreciated.
Thanks.